Suatu fungsi dirumuskan oleh f(x+3) = 4x + 5. Nilai dari f(21) adalah...
a. 72
b. 77
c. 84
d. 89
[tex]f(x + 3) = 4x + 5[/tex]
[tex]f(x) + 3 = 4x + 5[/tex]
[tex]f(x) = 4x + 5 - 3[/tex]
[tex]f(x) = 4x + 2[/tex]
[tex]f(21) = 4(21) + 2[/tex]
[tex]f(21) = 84 + 2[/tex]
[tex]f(21) = 86[/tex]
[tex]\blue{\boxed{\blue{\boxed{\purple{\tt{\ \: \red{{ ༻ 彡 I \: Love \: Nanaz 彡 ༺ }}}}}}}}[/tex]
SOAL 1
___________________________________________
f(x + 3) = 4x + 5
f(x) = 4x + 5 - 3
f(x) = 4x + 2
___________________________________________
f(21) = 4(21) + 2
f(21) = (4.21) + 2
f(21) = 84 + 2
f(21) = 86
___________________________________________ [tex] {\mathcal\color{purple}{{\pink{\underline{\purple{\underline\bold{\pink{X}\bold\color{violet}{x\bold{\pink{F}\bold\color{violet}{i\bold{\pink{q}\bold\color{violet}{a\bold{\pink{h}\bold\color{violet}{\bold{\pink{}\bold\color{violet}{\bold{\pink{}\bold\color{violet}{\bold{\pink{}\bold\color{violet}{x\bold{\pink{X}}}}}}}}}}}}}}}}}}}}}}[/tex]
[answer.2.content]
